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## Cobzaş, Ştefan

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 Author ID: cobzas.stefan Published as: Cobzaş, S.; Cobzaş, Ştefan; Cobzas, S.; Cobzaş, Stefan; Cobzaş, Ş.; Cobzas, Stefan
 Documents Indexed: 67 Publications since 1974, including 4 Books Reviewing Activity: 530 Reviews Biographic References: 1 Publication
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#### Co-Authors

 49 single-authored 6 Muntean, Ioan Lucian 6 Mustăţa, Costică 1 Czerwik, Stefan 1 Lin, Fucai 1 Lin, Shou 1 Liu, Chuan 1 Mabula, M. D. 1 Miculescu, Radu 1 Nicolae, Adriana 1 Rus, Mircea Dan
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#### Serials

 10 Revue d’Analyse Numérique et de Théorie de l’Approximation 6 Topology and its Applications 5 Mathématica – Revue d’Analyse Numérique et de Théorie de l’Approximation. L’Analyse Numérique et la Théorie de l’Approximation 5 Studia Universitatis Babeş-Bolyai. Mathematica 3 Mathématica – Revue d’Analyse Numérique et de Théorie de l’Approximation. Mathématica 2 Journal of Mathematical Analysis and Applications 2 Journal of Approximation Theory 2 Buletinul Ştiinţific al Universităţii din Baia Mare. Seria B. Fascicola Matematică - Informatică 2 Preprint. “Babeş-Bolyai” University. Faculty of Mathematics and Physics. Research Seminars 1 Acta Universitatis Carolinae. Mathematica et Physica 1 Mathematica Balkanica 1 Archiv der Mathematik 1 Commentationes Mathematicae Universitatis Carolinae 1 International Journal of Mathematics and Mathematical Sciences 1 Quaestiones Mathematicae 1 Real Analysis Exchange 1 Annals of Operations Research 1 Aequationes Mathematicae 1 Mathematica 1 Journal of Mathematical Sciences (New York) 1 European Mathematical Society Newsletter 1 Analele Universităţii din Timişoara. Seria Matematică-Informatică 1 Abstract and Applied Analysis 1 Fixed Point Theory 1 Fixed Point Theory and Applications 1 Gazeta Matematică. Revistă de Cultură Matematică 1 Preprint. “Babeş-Bolyai” University. Faculty of Mathematics. Research Seminars 1 Lecture Notes in Mathematics 1 Advances in Operator Theory 1 Frontiers in Mathematics
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#### Fields

 43 Functional analysis (46-XX) 24 Approximations and expansions (41-XX) 13 General topology (54-XX) 12 Operator theory (47-XX) 5 Calculus of variations and optimal control; optimization (49-XX) 4 Real functions (26-XX) 3 Global analysis, analysis on manifolds (58-XX) 2 General and overarching topics; collections (00-XX) 2 Order, lattices, ordered algebraic structures (06-XX) 2 Measure and integration (28-XX) 2 Harmonic analysis on Euclidean spaces (42-XX) 2 Operations research, mathematical programming (90-XX) 1 History and biography (01-XX) 1 Topological groups, Lie groups (22-XX) 1 Functions of a complex variable (30-XX) 1 Probability theory and stochastic processes (60-XX) 1 Game theory, economics, finance, and other social and behavioral sciences (91-XX)

#### Citations contained in zbMATH Open

38 Publications have been cited 233 times in 165 Documents Cited by Year
Functional analysis in asymmetric normed spaces. Zbl 1266.46001
Cobzaş, Ştefan
2013
Completeness in quasi-metric spaces and Ekeland variational principle. Zbl 1217.54026
Cobzaş, S.
2011
Generic existence of solutions for some perturbed optimization problems. Zbl 0957.49014
Cobzaş, S.
2000
Separation of convex sets and best approximation in spaces with asymmetric norm. Zbl 1082.41024
Cobzaş, S.
2004
Functional analysis in asymmetric normed spaces. Zbl 1296.46001
Cobzaş, S.
2011
Geometric properties of Banach spaces and the existence of nearest and farthest points. Zbl 1100.46005
Cobzaş, Stefan
2005
Non convex optimization problems on weakly compact subsets of Banach spaces. Zbl 0456.49008
Cobzas, S.
1980
Asymmetric locally convex spaces. Zbl 1096.46002
Cobzaş, S.
2005
Condensation of singularities and divergence results in approximation theory. Zbl 0478.41030
Cobzas, Stefan; Muntean, Ioan
1981
Variational principles, completeness and the existence of traps in behavioral sciences. Zbl 07032526
Bao, T. Q.; Cobzaş, S.; Soubeyran, A.
2018
Antiproximinal sets in some Banach spaces. Zbl 0311.41028
Cobzas, S.
1974
Compact and precompact sets in asymmetric locally convex spaces. Zbl 1185.46001
Cobzaş, S.
2009
Antiproximinal sets in Banach spaces of $$c_0$$-type. Zbl 0408.41017
Cobzas, S.
1978
Lipschitz functions. Zbl 1431.26002
2019
Antiproximinal sets in Banach spaces of continuous functions. Zbl 0407.46025
Cobzas, S.
1976
Ekeland variational principle in asymmetric locally convex spaces. Zbl 1251.46039
Cobzaş, S.
2012
Extension of bounded linear functionals and best approximation in spaces with asymmetric norm. Zbl 1228.41029
Cobzaş, Stefan; Mustăţa, Costica
2004
Completeness with respect to the probabilistic Pompeiu-Hausdorff metric. Zbl 1164.46040
Cobzaş, Ştefan
2007
Free Abelian paratopological groups over metric spaces. Zbl 1307.22001
Lin, Fucai; Liu, Chuan; Lin, Shou; Cobzas, Stefan
2015
Norm-preserving extension of convex Lipschitz functions. Zbl 0405.41023
Cobzas, S.; Mustata, C.
1978
A Mazur-Ulam theorem for probabilistic normed spaces. Zbl 1214.46055
Cobzaş, Stefan
2009
Antiproximinal sets in Banach spaces. Zbl 1010.46015
Cobzas, S.
1999
Antiproximinal sets in the Banach space $$c( X)$$. Zbl 0887.41029
Cobzaş, S.
1997
Continuous and locally Lipschitz convex functions. Zbl 0385.46029
Cobzas, Stefan; Muntean, Ioan
1976
Zabrejko’s lemma and the fundamental principles of functional analysis in the asymmetric case. Zbl 1322.46004
Mabula, M. D.; Cobzaş, S.
2015
Duality relations and characterizations of best approximation for p- convex sets. Zbl 0647.41023
Cobzaş, Ştefan; Muntean, Ioan
1987
Ekeland, Takahashi and Caristi principles in quasi-pseudometric spaces. Zbl 1423.58009
Cobzaş, S.
2019
The completion of generalized b-metric spaces and fixed points. Zbl 1456.54012
Cobzaş, Ştefan; Czerwik, Stefan
2020
Some questions in the theory of Šerstnev random normed spaces. Zbl 1037.46066
Cobzaş, Ştefan
2002
Antiproximinal sets in the Banach space $$C(\omega^k;X)$$. Zbl 1075.46509
Cobzaş, S.
1998
Lipschitz properties for families of convex mappings. Zbl 1079.46522
Cobzaş, Ş.
2001
Best approximation in random normed spaces. Zbl 1073.46515
Cobzaş, Stefan
2003
Support functionals of the unit ball in Banach spaces of bounded functions. Zbl 0744.46011
Cobzaş, S.
1986
Hahn decompositions of finitely additive measures. Zbl 0338.28004
Cobzas, S.
1976
Fixed point theorems in locally convex spaces – the Schauder mapping method. Zbl 1103.47045
Cobzaş, S.
2006
Compact operators on spaces with asymmetric norm. Zbl 1150.46312
Cobzaş, Ş.
2006
Normal cones and Thompson metric. Zbl 1330.46007
Cobzaş, Ştefan; Rus, Mircea-Dan
2014
Book review of: A. Kubzdela, Selected topics in non-Archimedean Banach spaces. Zbl 1403.00004
Cobzaş, Stefan
2018
The completion of generalized b-metric spaces and fixed points. Zbl 1456.54012
Cobzaş, Ştefan; Czerwik, Stefan
2020
Lipschitz functions. Zbl 1431.26002
2019
Ekeland, Takahashi and Caristi principles in quasi-pseudometric spaces. Zbl 1423.58009
Cobzaş, S.
2019
Variational principles, completeness and the existence of traps in behavioral sciences. Zbl 07032526
Bao, T. Q.; Cobzaş, S.; Soubeyran, A.
2018
Book review of: A. Kubzdela, Selected topics in non-Archimedean Banach spaces. Zbl 1403.00004
Cobzaş, Stefan
2018
Free Abelian paratopological groups over metric spaces. Zbl 1307.22001
Lin, Fucai; Liu, Chuan; Lin, Shou; Cobzas, Stefan
2015
Zabrejko’s lemma and the fundamental principles of functional analysis in the asymmetric case. Zbl 1322.46004
Mabula, M. D.; Cobzaş, S.
2015
Normal cones and Thompson metric. Zbl 1330.46007
Cobzaş, Ştefan; Rus, Mircea-Dan
2014
Functional analysis in asymmetric normed spaces. Zbl 1266.46001
Cobzaş, Ştefan
2013
Ekeland variational principle in asymmetric locally convex spaces. Zbl 1251.46039
Cobzaş, S.
2012
Completeness in quasi-metric spaces and Ekeland variational principle. Zbl 1217.54026
Cobzaş, S.
2011
Functional analysis in asymmetric normed spaces. Zbl 1296.46001
Cobzaş, S.
2011
Compact and precompact sets in asymmetric locally convex spaces. Zbl 1185.46001
Cobzaş, S.
2009
A Mazur-Ulam theorem for probabilistic normed spaces. Zbl 1214.46055
Cobzaş, Stefan
2009
Completeness with respect to the probabilistic Pompeiu-Hausdorff metric. Zbl 1164.46040
Cobzaş, Ştefan
2007
Fixed point theorems in locally convex spaces – the Schauder mapping method. Zbl 1103.47045
Cobzaş, S.
2006
Compact operators on spaces with asymmetric norm. Zbl 1150.46312
Cobzaş, Ş.
2006
Geometric properties of Banach spaces and the existence of nearest and farthest points. Zbl 1100.46005
Cobzaş, Stefan
2005
Asymmetric locally convex spaces. Zbl 1096.46002
Cobzaş, S.
2005
Separation of convex sets and best approximation in spaces with asymmetric norm. Zbl 1082.41024
Cobzaş, S.
2004
Extension of bounded linear functionals and best approximation in spaces with asymmetric norm. Zbl 1228.41029
Cobzaş, Stefan; Mustăţa, Costica
2004
Best approximation in random normed spaces. Zbl 1073.46515
Cobzaş, Stefan
2003
Some questions in the theory of Šerstnev random normed spaces. Zbl 1037.46066
Cobzaş, Ştefan
2002
Lipschitz properties for families of convex mappings. Zbl 1079.46522
Cobzaş, Ş.
2001
Generic existence of solutions for some perturbed optimization problems. Zbl 0957.49014
Cobzaş, S.
2000
Antiproximinal sets in Banach spaces. Zbl 1010.46015
Cobzas, S.
1999
Antiproximinal sets in the Banach space $$C(\omega^k;X)$$. Zbl 1075.46509
Cobzaş, S.
1998
Antiproximinal sets in the Banach space $$c( X)$$. Zbl 0887.41029
Cobzaş, S.
1997
Duality relations and characterizations of best approximation for p- convex sets. Zbl 0647.41023
Cobzaş, Ştefan; Muntean, Ioan
1987
Support functionals of the unit ball in Banach spaces of bounded functions. Zbl 0744.46011
Cobzaş, S.
1986
Condensation of singularities and divergence results in approximation theory. Zbl 0478.41030
Cobzas, Stefan; Muntean, Ioan
1981
Non convex optimization problems on weakly compact subsets of Banach spaces. Zbl 0456.49008
Cobzas, S.
1980
Antiproximinal sets in Banach spaces of $$c_0$$-type. Zbl 0408.41017
Cobzas, S.
1978
Norm-preserving extension of convex Lipschitz functions. Zbl 0405.41023
Cobzas, S.; Mustata, C.
1978
Antiproximinal sets in Banach spaces of continuous functions. Zbl 0407.46025
Cobzas, S.
1976
Continuous and locally Lipschitz convex functions. Zbl 0385.46029
Cobzas, Stefan; Muntean, Ioan
1976
Hahn decompositions of finitely additive measures. Zbl 0338.28004
Cobzas, S.
1976
Antiproximinal sets in some Banach spaces. Zbl 0311.41028
Cobzas, S.
1974
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#### Cited by 213 Authors

 11 Cobzaş, Ştefan 9 Künzi, Hans-Peter A. 8 Alegre, Carmen 7 Altun, Ishak 7 Li, Chong 7 Romaguera Bonilla, Salvador 6 Olela Otafudu, Olivier 6 Sánchez-Pérez, Enrique Alfonso 4 Jonard-Pérez, Natalia 4 Karapınar, Erdal 4 Soubeyran, Antoine 4 Zaslavski, Alexander Yakovlevich 3 Bachir, Mohammed 3 Beer, Gerald Alan 3 Cai, Zhangyong Cai 3 Lin, Shou 3 Mabula, M. D. 3 Mitrea, Alexandru-Ioan 3 Peng, Lihui 3 Trif, Tiberiu 3 Xiao, Jianzhong 3 Zhu, Xinghua 2 Agarwal, Ravi P. 2 Agyingi, Collins Amburo 2 Balaganskij, V. S. 2 Breckner, Wolfgang W. 2 Conradie, J. J. 2 Conradie, Jurie 2 Dağ, Hacer 2 Dudov, Sergeĭ Ivanovich 2 Espínola García, Rafael 2 Fonf, Vladimir P. 2 García-Raffi, Luis M. 2 Hai, Le Phuoc 2 He, Fei 2 İlkhan, Merve 2 Jahn, Thomas 2 Kara, Emrah Evren 2 Luo, Xianfa 2 Marín, Josefa 2 Qiu, Jinghui 2 Sadarangani, Kishin B. 2 Şimşek, Hakan 2 Stonyakin, Fedor Sergeevich 2 Truong Quang Bao 2 Valero, Oscar 2 Yao, Jen-Chih 2 Yildiz, Filiz 1 Abbas, Mujahid 1 Abbas, Said 1 Abramova, Veronika Valer’evna 1 Acar, Özlem 1 Akkouchi, Mohamed 1 Al-Homidan, Suliman S. 1 Alaca, Cihangir 1 Alfaqih, Waleed Mohd. 1 Ali, Basit 1 Alimov, Alexey R. 1 Ansari, Qamrul Hasan 1 Bandyopadhyay, Pradipta 1 Bednov, Borislav Borisovich 1 Benchohra, Mouffak 1 Berinde, Vasile 1 Berzig, Maher 1 Blasco, Xavier 1 Borwein, Jonathan Michael 1 Bota, Monica-Felicia 1 Bouali, Marwa 1 Bounkhel, Messaoud 1 Burdejová, Petra 1 Cánovas, María Josefa 1 Chaira, Karim 1 Chaobankoh, Tanadon 1 Chistyakov, Vyacheslav V. 1 Cho, Yeol Je 1 Choi, Geunsu 1 Choi, Yun Sung 1 Czerwik, Stefan 1 Dahia, Elhadj 1 Daniilidis, Aris 1 de la Sen, Manuel 1 de O. Souza, João Carlos 1 Donjuán, Victor 1 Eladraoui, Abderrahim 1 Estevan, Asier 1 Fahimuddin 1 Farrokhiniya, M. 1 Ferrando, Irene 1 Flores, Gonzalo 1 Fukuoka, Ryuichi 1 García-Lirola, Luis Carlos 1 Göpfert, Alfred 1 Gupta, Sahil 1 Guran, Liliana 1 Gutev, Valentin G. 1 Gutiérrez García, Javier 1 Haihambo, Paulus 1 Halčinová, Lenka 1 Härdle, Wolfgang Karl 1 He, Yiran ...and 113 more Authors
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#### Cited in 67 Serials

 27 Topology and its Applications 14 Journal of Mathematical Analysis and Applications 7 Mathematical Notes 6 Nonlinear Analysis. Theory, Methods & Applications. Series A: Theory and Methods 6 Journal of Fixed Point Theory and Applications 5 Journal of Global Optimization 5 Abstract and Applied Analysis 5 Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A: Matemáticas. RACSAM 4 Fuzzy Sets and Systems 4 Journal of Optimization Theory and Applications 4 Quaestiones Mathematicae 4 Optimization 4 Journal of Convex Analysis 4 Fixed Point Theory and Applications 3 Journal of Approximation Theory 3 Results in Mathematics 3 Acta Mathematica Hungarica 2 Archiv der Mathematik 2 Numerical Functional Analysis and Optimization 2 Mediterranean Journal of Mathematics 2 Journal of Nonlinear Science and Applications 2 Mathematical Sciences 2 Journal of Mathematics 1 Analysis Mathematica 1 Moscow University Mathematics Bulletin 1 Rocky Mountain Journal of Mathematics 1 Annali di Matematica Pura ed Applicata. Serie Quarta 1 Calcolo 1 Colloquium Mathematicum 1 Demonstratio Mathematica 1 Fasciculi Mathematici 1 Journal of Functional Analysis 1 Journal of Multivariate Analysis 1 Journal of Pure and Applied Algebra 1 Manuscripta Mathematica 1 Monatshefte für Mathematik 1 Proceedings of the American Mathematical Society 1 Acta Applicandae Mathematicae 1 International Journal of Approximate Reasoning 1 Mathematical and Computer Modelling 1 Annals of Operations Research 1 Aequationes Mathematicae 1 L’Enseignement Mathématique. 2e Série 1 Mathematical Programming. Series A. Series B 1 Russian Mathematics 1 Applied Categorical Structures 1 Journal of Mathematical Sciences (New York) 1 Taiwanese Journal of Mathematics 1 Journal of Inequalities and Applications 1 Mathematica Moravica 1 Discrete Dynamics in Nature and Society 1 Communications in Nonlinear Science and Numerical Simulation 1 Bulletin of the Malaysian Mathematical Sciences Society. Second Series 1 Journal of Function Spaces and Applications 1 Advances in Difference Equations 1 Proyecciones 1 Proceedings of the Steklov Institute of Mathematics 1 Optimization Letters 1 Set-Valued and Variational Analysis 1 Eurasian Mathematical Journal 1 ISRN Mathematical Analysis 1 Arabian Journal of Mathematics 1 Journal of Applied Analysis and Computation 1 Axioms 1 Journal of Function Spaces 1 Advances in Operator Theory 1 Journal of Nonlinear and Variational Analysis
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#### Cited in 29 Fields

 74 General topology (54-XX) 69 Functional analysis (46-XX) 42 Operator theory (47-XX) 26 Calculus of variations and optimal control; optimization (49-XX) 24 Approximations and expansions (41-XX) 20 Operations research, mathematical programming (90-XX) 12 Real functions (26-XX) 9 Convex and discrete geometry (52-XX) 8 Global analysis, analysis on manifolds (58-XX) 6 Measure and integration (28-XX) 5 Topological groups, Lie groups (22-XX) 5 Differential geometry (53-XX) 4 Ordinary differential equations (34-XX) 3 Order, lattices, ordered algebraic structures (06-XX) 2 Dynamical systems and ergodic theory (37-XX) 2 Geometry (51-XX) 2 Numerical analysis (65-XX) 2 Computer science (68-XX) 2 Game theory, economics, finance, and other social and behavioral sciences (91-XX) 1 Algebraic geometry (14-XX) 1 Potential theory (31-XX) 1 Several complex variables and analytic spaces (32-XX) 1 Sequences, series, summability (40-XX) 1 Harmonic analysis on Euclidean spaces (42-XX) 1 Integral transforms, operational calculus (44-XX) 1 Integral equations (45-XX) 1 Manifolds and cell complexes (57-XX) 1 Probability theory and stochastic processes (60-XX) 1 Statistics (62-XX)